Here's a little tutorial on finding the Send address & class when the AoBs stop working. This does not require attaching any debugger to maplestory, however it will require you to have MSCRC bypass, as you will need to hook functions in-game....
The End of an Era - A Final Thank You.
Finding the send address & class without AoBs / debugger
How to find the send address on any version of maplestory when AoBs are broken.